A primiparous woman whose blood type is O positive gives birth at term to an infant who has A-positive blood and a hematocrit of 55%. A total serum bilirubin level obtained at 36 hours of age is 12 mg/dL. Which of the following additional laboratory findings would be characteristic of ABO hemolytic disease in this infant?()

A normal reticulocyte count
B. Coarctation of the aorta
C. A positive direct Coombs test
D. ASD
E. Crescent-shaped red blood cells in the blood smear
F. Mitral valve prolapse
G. Elevated hemoglobin
H. Pulmonic stenosis
I. Petechiae Questions 3 to 5 For each case presented, select the cardiovascular defect with which the examination findings are most likely to be associated. Each lettered option may be used once, more than once, or not at all.
J. Patent ductus arteriosis